62 REPORT OF THE No. 3 



Appendix No. 24 



Extract from J. S. Dobie's report of traverse Allanwater and part Ogoki Rivers, 

 district of Thunder Bay. 



"As in previous seasons posts were planted at intervals of about a mile 

 apart along the shore. These posts were tied to the nearest transit station and 

 the tie recorded in the field notes. Each post is surrounded by a mound of 

 stones about five feet in diameter and about two feet high. Each post was 

 marked with the letter 'P' followed by the number of the post, the whole being 

 inscribed with a proper scribing iron. 



"The islands were also numbered consecutively. On each island either a 

 post was planted in a manner similar to'that already described and marked with 

 the number of the island, or a healthy tree was squared and similarly marked. 

 In a few cases small islands were not marked, where the islands were low and 

 without trees large enough to mark, and where the exposed position of the island 

 would make it probable that floods or ice would remove the post, or where there 

 were not stones to make suitable mounds. Any such islands are very small and 

 are easily identified by reference to the plan. 



"Standard metal posts or monuments were cemented into holes drilled 

 into the rock at regular intervals along the shore in a manner similar to that 

 described in previous years. Twenty-five such posts were planted during the 

 season. 



"Levels were taken at all falls and rapids, and are all based on the elevation 

 of a Geodetic survey bench mark set in the west concrete abutment of the Allan- 

 water railway bridge. This bench mark is recorded as Number 1023, elevation 

 1353, 9194. No attempt was made to carry levels across large bodies of water, 

 but immediately after ascertaining the elevation of any lake expansion, a water 

 gauge was established so that if the water level varied before further levelling 

 was necessary, the difference could be properly allowed for. In case of long 

 stretches of river with perceptible current the differences in elevation were 

 estimated, proper allowance being made for variation in water level due to rain 

 or other conditions. The elevations of the various lake expansions and other 

 stretches of still water are all shown on the plan which forms part of the returns 

 of this survey and are to be considered as approximately correct. They are 

 subject to future revision but it is considered that they are correct enough for all 

 practical purposes for some time to come. 



"The Allanwater River crosses the Canadian National Railway a short 

 distance east of the point of commencement of the survey. There is here a 

 small lake expansion with a long bay running to the northwest for a distance 

 of over three miles. About a mile downstream from the starting point a dam 

 has been constructed across the river by a local lumber company. This dam 

 has raised the water about four feet and considerable difficulty was experienced 

 in carrying the survey past some of the flooded ground. 



"From this dam the river runs a little east of north for two miles and then 

 turns sharply to the east for half a mile, where it branches and runs around a 

 large island nearly four miles long. This island is No. 7 and contains 1,676 

 acres. The westerly channel is the one most used for canoe traffic. The river 

 generally is shallow and stony with several flat rapids. 



"A water power reserve of 32.67 acres was posted at the first rapids below 

 where the river divides to flow around island No. 7. There is here a fall of 

 about seven feet, and the water possibilities are not very great as the nature of 



